摘要
以某双柱式钢筋混凝土连续梁桥桥墩作为研究对象,对其进行了3种方式的CFRP抗震加固。采用有限元分析软件Open Sees进行了Pushover分析和滞回性能分析。研究结果表明:利用CFRP对该桥墩进行加固,构件的延性得到了大幅提升,塑性铰范围增大,滞回耗能能力提高,有效提高了其抗震性能。对于破坏模式为弯曲破坏的长柱,3种加固方式的加固效果接近,基于Seible等所提的加固方式改进的塑性铰加固方式对于纵桥向和横桥向力学特性不同的框架式桥墩有良好的加固效果,加固方式更为合理。
Taking a reinforced concrete continuous girder bridge with double - column piers as the research object, seismic strengthening of the column with CFRP in three ways was conducled. The finite element software OpenSees was used to carry out pushover analysis and hysteretic beharior analysis. The results indicate that strenthening of RC bridge columns with CFRP can improve the ductility of the member, enlarge the range of plastic hinges, and enhance the hysteretic energy dissipation capacity. The seismic performance of the pier is improved effectively. As to the long column whose failure mode is flexural failure, the strengthening effects of the three modes are closely the same. The improved method of strengthening plastic hinges based on Seible et al. model can achieve well effects for double-column piers whose mechanical property has differences in longitudinal or transverse direction, and this method is more rational.
出处
《世界地震工程》
CSCD
北大核心
2015年第4期250-259,共10页
World Earthquake Engineering
基金
2012年国家自然科学基金项目:大型建筑结构多尺度有限元协同分析的抗震混合试验方法(51278322)
"江苏省高校优势学科建设工程资助项目"
